public class demo8 {
    public static void main(String[] args) {
        Thread thread = new Thread(()->{
            try {
                Thread.sleep(9000000);
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
            System.out.println("正在执行 thread 线程");
        });
        thread.start();

        System.out.println("正在执行 main 线程");
    }
}
